At Yahoo!, Mayer has opened the door to a potentially lucrative space. But there's more work to be done.

Compare and contrast with the 41% decline in (retail) recorded music revenue ... Indeed it is the 60% growth in live revenue that has done most to offset the impact of declining music sales.

According to MiDIA, the music industry can thank live music for the fact that it only contracted -- overall -- by roughly 3% between 2000 and 2013.

If this doesn't set off further light bulbs in the heads of management at Yahoo! (YHOO) I'm not sure what will.

Credit Marissa Mayer for either following my lead or having the same thoughts as I did with respect to live concert streaming independent of me having and writing about these thoughts.

I knew something was up in December 2013 when Mayer followed me on Twitter (TWTR) shortly after I published Marissa Mayer's Biggest Game Changer Yet. In that article, I began tunneling a trajectory of thought that would prove prescient: Yahoo! should seize the massive opportunity to take ownership of the largely neglected live concert streaming space.

Around that time and since then, we have seen Yahoo!, via the fantastic Yahoo! Screen, stream several one-off live performances from acts as big as One Direction and in conjunction with Clear Channel Media and Entertainment'siHeart Radio. (Disclosure: I recently became a Clear Channel employee, working part-time as a sports talk personality on Fox Sports Radio).

Clearly, somebody at Yahoo! was listening because, at the end of April 2014 -- a good 16 months after I started beating the drum -- the company announced a partnership with Live Nation Entertainment (LVY) to stream one live concert per day for 365 days starting this summer.

That alone puts Mayer near top of 2014's boldest and most visionary CEOs. On Page Two, I get deeper into how she could end up -- Tim Cook aside -- the best.